Cash, Cash Equivalents and Investments - Fair value and Amortized cost (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Debt Securities, Available-for-sale [Line Items]
Cash and Cash Equivalents	$ 13,470	$ 30,819
Investments	7,918	39,676
Cash, cash equivalents and money market funds
Debt Securities, Available-for-sale [Line Items]
Cash and Cash Equivalents	13,470	30,819
Available-for-sale:
Amortized Cost	13,470	30,819
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Estimated Fair Value	13,470	30,819
U.S. Treasury securities
Debt Securities, Available-for-sale [Line Items]
Investments	7,918	37,197
Available-for-sale:
Amortized Cost	7,922	37,458
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(4)	(261)
Estimated Fair Value	7,918	37,197
Corporate debt securities
Debt Securities, Available-for-sale [Line Items]
Investments		1,996
Available-for-sale:
Amortized Cost		1,999
Gross Unrealized Gains		0
Gross Unrealized Losses		(3)
Estimated Fair Value		1,996
Certificates of deposit
Debt Securities, Available-for-sale [Line Items]
Investments		483
Available-for-sale:
Amortized Cost		485
Gross Unrealized Gains		0
Gross Unrealized Losses		(2)
Estimated Fair Value		483
Total
Debt Securities, Available-for-sale [Line Items]
Cash and Cash Equivalents	13,470	30,819
Investments	7,918	39,676
Available-for-sale:
Amortized Cost	21,392	70,761
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(4)	(266)
Estimated Fair Value	$ 21,388	$ 70,495